package com.zmzncs.lmtc.common.util;

import org.springframework.util.DigestUtils;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Util {

    private static String byteArrayToHexString(byte b[]) {
        StringBuffer resultSb = new StringBuffer();
        for (int i = 0; i < b.length; i++)
            resultSb.append(byteToHexString(b[i]));
        return resultSb.toString();
    }

    //32位大写toUpperCase()
    public static String md5(String str) {
        return DigestUtils.md5DigestAsHex(str.getBytes()).toUpperCase();

/*        String re_md5 = new String();
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(str.getBytes());
            byte b[] = md.digest();
            int i;
            StringBuffer buf = new StringBuffer("");
            for (int offset = 0; offset < b.length; offset++) {
                i = b[offset];
                if (i < 0)
                    i += 256;
                if (i < 16)
                    buf.append("0");
                buf.append(Integer.toHexString(i));
            }
            re_md5 = buf.toString().toUpperCase();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return re_md5;*/
    }

    private static String byteToHexString(byte b) {
        int n = b;
        if (n < 0)
            n += 256;
        int d1 = n / 16;
        int d2 = n % 16;
        return hexDigits[d1] + hexDigits[d2];
    }

    public static String MD5Encode(String origin, String charsetname) {
        String resultString = null;
        try {
            resultString = new String(origin);
            MessageDigest md = MessageDigest.getInstance("MD5");
            if (charsetname == null || "".equals(charsetname))
                resultString = byteArrayToHexString(md.digest(resultString
                        .getBytes()));
            else
                resultString = byteArrayToHexString(md.digest(resultString
                        .getBytes(charsetname)));
        } catch (Exception exception) {
        }
        return resultString;
    }


    public static String convertMD5(String inStr) {
        char[] a = inStr.toCharArray();
        for (int i = 0; i < a.length; i++) {
            a[i] = (char) (a[i] ^ 't');
        }
        String s = new String(a);
        return s;
    }

    private static final String hexDigits[] = {"0", "1", "2", "3", "4", "5",
            "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};


    public static void main(String[] args) {
        String ss = "{\"address\":\"北京市西城区\",\"area_id\":110102,\"com_id\":311741,\"lat\":\"40.033213\",\"lng\":\"116.311713\",\"operate_time\":1601286049,\"order_id\":\"A1_2C16012860779602\",\"park_id\":\"laoyao1\",\"park_name\":\"laoyao\",\"park_union_id\":200386,\"plate_number\":\"冀A11111\",\"qrUrl\":\"118888\",\"rand\":\"1601286049341\",\"start_time\":1601286077,\"time_temp\":1601286049}key=18B0A682A8E6AA19";
        String md5 = md5(ss);
        System.out.printf(md5);
    }

}